The Mark IV dial is flawless, not a single mark or anything you can find to complain about. These are getting rare in such condition. The Model reference 1680 was introduced in 1968/9 with meters first dial, and in the early 1970s the dials were feet first. About in 1975 the red writing disappeared and the word SUBMARINER was written in White since then.
I love the strong faded fat font bezel on this watch which gives it a unique appeal.
This watch still carries the original 9315 bracelet which are getting quite rare these times.